Aller au menu Aller au contenu
Synthèse et propriétés de monocristaux, de poudres, films minces ou hétérostructures

Etudes à l'interface avec la matière biologique

> LMGP_ Recherche > Nano

Papier de Athanasios Gkountaras 2020

Publié le 10 mars 2020
A+Augmenter la taille du texteA-Réduire la taille du texteImprimer le documentEnvoyer cette page par mail cet article Facebook Twitter Linked In
Communiqué du 10 janvier 2020 au 27 février 2020

Le papier "Mechanical Exfoliation of Select MAX Phases and Mo4Ce4Al7C3 Single Crystals to Produce MAXenes" a été publié dans Small

Mxenes flakes

Mxenes flakes

Ici vous trouverez le papier de Athanasios Gkountaras
 " MXenes—2D carbides/nitrides derived from their bulk nanolamellar Mn+1AXn  phase (MAX) counterparts—are, for the most part, obtained by chemical etching. Despite the fact that the MA bonds in the MAX phases are not weak, in this work it is demonstrated that relatively large MAX single crystals can be mechanically exfoliated using the adhesive tape method to produce flakes whose thickness can be reduced down to half a unit cell. The exfoliated flakes, transferred onto SiO2/Si substrates, are analyzed using electric force microscopy (EFM). No appreciable variation in EFM signal with flake thickness is found. EFM contrast between the flakes and SiO2 not only depends on the contact surface potential, but also on the local capacitance. The contribution of the latter can be used to show the metallic character— confirmed by four-contact resistivity measurements—of even the thinnest of flakes. Because the A-layers are preserved, strictly speaking MXenes are not dealt with in this work, but rather MAXenes. This is important in the case where the “A” layers contain magnetic elements such as Mo4Ce4Al7C3, whose structure is a derivative of the MAX structure."


A+Augmenter la taille du texteA-Réduire la taille du texteImprimer le documentEnvoyer cette page par mail cet article Facebook Twitter Linked In

mise à jour le 10 mars 2020

  • Tutelle CNRS
  • Tutelle Grenoble INP
Université Grenoble Alpes